Domestic Hot Water Plate Heat Exchanger for NW24-1LH and ZW24 Ref. 8705406287

Neckar boilers compatible with reference 8705406287

Plate heat exchanger with reference 8705406287. 16 verified compatibilities: NW24-1 LH AE23 and NW24-1 LH AE31.

Proven compatibility

Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.

How to check if ref. 8705406287 is the part for your boiler

What determines it is not the boiler model, but the reference printed on the part you already have installed.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference 8705406287. If it is not visible, do not identify the part from its shape alone.
2. Check the full boiler model on its data plate and look for it in the model associations on this page.
3. Compare the connections and physical body with the original part before installation.
4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Symptoms and faults that the heat exchanger 8705406287 resolves.

The plate heat exchanger transfers heat to the domestic hot water. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  There is no domestic hot water or the temperature fluctuates on its own.

  Cause: The heat exchanger does not transfer heat consistently between the primary circuit and the consumption circuit.

  Check if the fault also occurs with low water flow; if it only happens at high flow, it may be a sizing issue and not a fault.

• 02

  You see water coming out from the heat exchanger area or notice humidity to the touch.

  Cause: A PCB has lost its tightness and water is leaking from the damaged point.

  Dry the area, start the boiler, and visually locate the exact point of the leak before requesting the spare part.

• 03

  You have to refill the pressure in the boiler more frequently than normal, without seeing any leaks on the outside.

  Cause: An internal leak between the primary circuit and the domestic hot water circuit allows water to pass from one side to the other of the heat exchanger.

  First, rule out the safety valve and the expansion vessel, as they are the most common causes of losing pressure without a visible leak.

• 04

  The hot water comes out at an irregular temperature, fluctuating up and down without touching the control.

  Cause: An uneven water flow through the plates causes the temperature sensor to receive unstable readings.

  Check the cold water inlet filter before replacing the heat exchanger: if it is dirty, it causes the same symptom.

These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.

Plate heat exchanger data sheet Neckar 8705406287

Catalogue reference

8705406287

Brand

Neckar

Type of part

Plate heat exchanger

Units in stock

4 units

Status

Refurbished

Warranty

1 year

Shipping

1-2 business days

Return

14 days

Data read on the part and in the manufacturer's documentation

What we have not been able to verify does not appear here.

Manufacture date (Man Date)

06/01/13

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

• Neckar NW24-1 LH KE23 manual (PDF)Document © Neckar, provided as a technical reference.